Multiplayer Game going Out of Sync

Age of Empires III: DE III - Report a Bug
1

:play_button: GAME INFORMATION

:backhand_index_pointing_down: These details are CRITICAL; DO NOT skip them or your issue may not be reviewed.

  • GAME BUILD #: 100.19.18309.0 (608133)
  • GAME PLATFORM: Steam
  • OPERATING SYSTEM: Windows 10

:play_button: ISSUE EXPERIENCED

:backhand_index_pointing_down: DESCRIBE THE ISSUE IN DETAIL (below). LIMIT TO ONE BUG PER THREAD.

Game goes Out of Sync as soon as it starts when I try to play Multiplayer. It happens for Lobby and Ranked Games. I tried playing against the AI only and it does not go out of sync. This issue happened also when I tried testing the Beta a few weeks ago. This did not happen pre-patch.

:play_button: FREQUENCY OF ISSUE

:backhand_index_pointing_down: How often does the issue occur? CHOSE ONE; DELETE THE REST!

  • 100% of the time and matches I play (ALWAYS)

:play_button: REPRODUCTION STEPS

:backhand_index_pointing_down: List CLEAR and DETAILED STEPS we can take to reproduce the issue ourselves… Be descriptive!

Here’s the steps to reproduce the issue:

  1. I host a lobby and when the game starts, it goes out of sync.

  2. Same thing happens when I load up for a Ranked Game, I match with someone and just as the game starts it goes out of sync.

:play_button: EXPECTED RESULT

:backhand_index_pointing_down: What was SUPPOSED to happen if the bug you encountered were not present?

I would be able to play multiplayer game.

:play_button: IMAGE

:backhand_index_pointing_down: ALWAYS attach a PICTURE (.jpg, .png, .gif) or VIDEO (.mp4, YouTube link) that highlights the problem.

image
image1920×1080 1.39 MB

image
image1920×1080 1.13 MB

:play_button: GAME FILES (SAVE / RECORDING)

:backhand_index_pointing_down: Attach a SAVE GAME (.aoe3Ysav) or GAME RECORDING (.aoe3Yrec) of the match where you encountered the issue. Link it below if using an external file service.

2

Hi! Can you try to disable your mods?

Disable steam cloud too

3

Thank you for the response. Disabling the steam cloud seems to have fixed the issue. Disabling mods did not fix it.

Thanks again!

4

Hello, it looks like the fix didn’t work. I tried a couple of ranked ladder games. The first one, I was able to play for a few minutes and it went out of sync. The second game went out of sync as soon as the game loaded.

This picture is from the second game.

image
image1920×1080 1.16 MB

I am attaching the rec from the second game and autosave from the first game:

MPAutoSave Sync Error 2026-09-15 19-50-36.age3Ysav (2.9 MB)

Record Game.age3Yrec (6.3 MB)

5

@Bronchy are you using any kind of overlay or external app that could interfere with the game?

6

The only things I can think of is the Steam Overlay which I have now deactivated and the Razer Central app for my peripherals (mouse, microphone and headset).

Edit: I also tried closing the Razer app and got OOS too.

image
image1920×1080 1.88 MB

7

HI! Could we have the desync files from your teammates too?

We need all of them to do a comparison

8

Hello @IkoKnight,

My opponent did not get a Sync Error file. Just the recorded game. I am attaching my sync file and the recorded file from both sides.

MPAutoSave Sync Error 2026-09-18 22-53-46.age3Ysav (2.5 MB)

Record Game.age3Yrec (6.3 MB)

Pratushh Record Game.age3Yrec (6.3 MB)

image
image1920×1080 2.23 MB

9

Hi, Bronchy and I have resolved this issue ourselves. We removed the two game folders in the computer and reinstalled the game, after that, the game functions normally, no more desync. So it’s likely because of the corrupted game files. Reinstallation is not enough, you need to remove two other game folders that are not removed when you uninstall:
C:\Program Files (x86)\Steam\steamapps\common\AoE3DE
C:\Users\Games\Age of Empires 3 DE